Add flag to SectorAddPieceToAny to indicate whether commp has already been performed

[dirkmc]

Checklist

• [X] This is not a new feature or an enhancement to the Filecoin protocol. If it is, please open an FIP issue.
• [X] This is not a new feature request. If it is, please file a feature request instead.
• [X] This is not brainstorming ideas. If you have an idea you'd like to discuss, please open a new discussion on the lotus forum and select the category as Ideas.
• [X] I have a specific, actionable, and well motivated improvement to propose.

Lotus component

• [ ] lotus daemon - chain sync
• [ ] lotus miner - mining and block production
• [X] lotus miner/worker - sealing
• [ ] lotus miner - proving(WindowPoSt)
• [ ] lotus miner/market - storage deal
• [ ] lotus miner/market - retrieval deal
• [ ] lotus miner/market - data transfer
• [ ] lotus client
• [ ] lotus JSON-RPC API
• [ ] lotus message management (mpool)
• [ ] Other

Improvement Suggestion

Boost performs commp before passing the deal data to the sealing subsystem. So there's no need for the sealing subsystem to perform commp a second time.

Proposal

Add a CommpVerified flag to the PieceDealInfo struct that is passed to SectorAddPieceToAny:

• CommpVerified: true The caller has already performed commp verification on the data.
• CommpVerified: true The caller has not performed commp verification on the data. Add Piece should perform commp verification.